Thread guide and adapter therefor



y 4, 1939- M. DURAF- 'FOURG THREAD GUIDE AND ADAPTER THEREFOR Filed May 26, 1938 Patented July 4, 1939 UNITED STATES PATENT OFFICE 3 Claims.

This invention relates to thread guides such as are used in textile machines as, for instance, on winding, knitting and Weaving machines for the purpose of guiding the yarn or thread, and particularly to reciprocating thread guides such as are used on coming machines. These guides are ordinarily supported upon a guide holder having a standard top or terminal end, and one of the objects of the invention is to provide a guide of hard and highly polished material such as a synthetic precious stone and an adapter formed to engage grooves in the side faces of the thread guide and in turn formed so as to fit the jaws of the standard holder and be rigidly held in engagement with the upper or outer portion of the standard holder.

A further object is to provide the guide itself, which has a downwardly rounded front face, with a circular passage extending from front to rear of the guide, and a slot coextensive with the passage and opening thereinto, by which the yarn may be inserted in the passage, the passage having its lower portion convexly rounded from front to rear. I 25 Other objects have to do with the details of construction and arrangement of parts, as will be more fully described hereinafter.

My invention is illustrated in the accompanying drawing wherein:

30 Fig. 1 is a front elevation of a conventional thread guide holder forming in itself no part of my invention.

Fig. 2 is an elevation of the adapter forming part of my invention.

35 Fig. 3 is a perspective View of the thread guide,

of course, Verygreatly enlarged.

Fig. 4 is a rear elevation of the upper end of the holder showing my adapter and the thread guide in place thereon.

0 Fig. 5 is a front elevation of the adapter applied to the holder and showing the thread guide in place thereon.

Fig. 6 is a section on the line 6-6 of Fig. 5.

Referring to this drawing, I0 designates the thread guide itself, which is oblong in face View, has the fiat and straight side faces I I, the downwardly curved front face I2 and the flat rear face I 3. The lower end of the thread guide is fiat and the upper lateral corners of the guide are beveled 50 at III, as are the lower lateral corners of the guide,

as at I5. The upper end of the thread guide is formed with a passage I6 extending from front to rear of the guide and having a narrow entrance slot I1. The upper face of the guide is formed. 55 with downwardly and inwardly beveled portions I 8 extending downward and inward to this throat or slot I1. The passage I6 is curved longitudinally on its bottom, as at I9 (see Fig. 6). The side faces II of the guide are formed with longitudinally extending grooves which open at 5 their ends upon the beveled portions I4 and I5. The standard thread guide holder is designated generally 2| and, as illustrated in Fig. 1, is formed at its upper end with an aperture 22 defined by two arcuate jaws 23. ture 22 is transversely straight. The lower end of the holder is slightly angular and is provided with a foot 24. This thread guide is not ordinarily provided with the two apertures 25 but I these apertures are used in connection with the 15 adapter now to be described, which adapter is part of my invention. The adapter designated generally 26 is so formed that it may be placed against the face of the holder 2| and at its upper edge the adapter, which is formed of a thin plate 20, or sheet of metal, is formed with the square slot or aperture 21. Each lateral edge of the'adapter adjacent the upper end thereof is outwardly curved at 28, and this edge adjacent the upper end of the aperture 21 is formed with the radially 5' extending tongues 29. Adjacent the lower end of the adapter, it is formed with the two openings 30 through which screws 3| pass into the screw-threaded apertures 25.

The rectangular opening 21 permits the thread 30 guide I 0 to be slipped into this opening from the open end thereof and the lateral edges or walls of the opening 21 will engage within the grooves 20. The adapter is placed in position against the front face of the holder 2| so that the rear face I3 of the thread guide is flush with the rear face of the holder 2|, as shown in Fig. 6. The beveled ends I4 of the thread guide fit just within the tips of the jaws 23 while the bevels I5 conform to the curvature at the junction of these jaws 23 4 with the body of the holder, as shown in Fig. 5. When the adapter has been put in place against the face of the holder 2| with the thread guide extending through the opening 22 of the holder, then the tongues 29 are bent over the front faces of the jaws 23 and around on the underside of these jaws, thus the adapter is held firmly at four points on the holder and the screws 3| engage the adapter rigidly with the holder and affords a solid and fast hold of the adapter on the holder Without any chance of the adapter becoming loosened through use or vibration. With the opening I6 of the thread guide formed as disclosed, the yarn cannot slip and stays in place at all times. Inasmuch as the rear face of the thread The inner edge of the aper- 10 guide is flush with the holder 2!, there is no tendency to interfere with the yarn. Inasmuch as the thread guide itself has the two relatively long slots 20 in its lateral faces, it is rigidly engaged with the adapter and cannot vibrate or oscillate therein and the adapter as before stated, is rigidly engaged with the guide holder 2|, so that it cannot move. Of course, it is to be understood that in the drawing, the thread guide has been illustrated very considerably enlarged. The thread guides should be made, as before stated, of very hard material, such as synthetic jewel.

It will be understood that in devices of this nature, the holder 2| moves from side to side horizontally and parallel to the cone upon which the yarn is being wound. In devices of this character, there is a stop means, however, that causes the holder 2| with its guide when it reaches a certain point to the right, to stop and then move to the left and then againntove to the right and so on, in other words, the holder is reciprocated, v At theend of each of these strokes, there is of necessitya shock. Wh en the shock occurs, the, yarn is liable to ,slip out of the guide opening. The circular opening 16 illustrated in this application will not permit the yarn to slip off or out of theguide opening whereas this slipping of the yarn out of the guide opening will occur where this guidelopening is not circular as illustrated in the present application. It will likewisebe seengthat this opening i8 is rounded transversely, as shown in Fig. 6, sothatv this form ofopening or passage for the yarn con-, forms to the angle at which the yarn passes through the guide. Since the yarn is soft, the angle usually found in guides of the same general character as minehav e often caused the yarn to break; Since the yarn reaches the guide opening Hi from a lower point and then travels horizon tally'to the cone mod ifying this angle modif es the t e nsion placed upon the yarn. It is to be particularly noted that the rear face I3 of the thread guide H1 is flush with the rear face of theholder Zll As Lprevibuslytstated, the yarn reaches therear face of the guide at an acute angle from a lower point and since the yarn is soft, there is always a tendency that some slack will exist: If there is a protrusion of: the thread guide at the rear of th holder, this slack will very often catch on the protrusion and the yarn will break. This is entirely obviatedwith my construction.

What is claimed is:

1. As an article of manufacture an adapter for supporting a thread guide in a holder, comprising a relatively thin metallic plate having a I rectangular recess extending inward from its upper end and adapted to receive a thread guide, the plate having two screw receiving apertures adjacent its lower end and the plate at its upper end on each side of the rectangular opening having a flexible tongue extending from the edge thereof and adapted to be bent over around the jaws of a standard guide holder.

2. The combination of a thread guide for textile machines formed of a block of hard and highly polished material, the block being rectangular in form and having a thread guide passage extending from front to rear at its upper end, the side. faces of the; thread guide being formed with vertically extending grooves, and an adapter for supporting the thread guide upon a holder, comprising a plate of thin metal having a rectangular opening; extendinginward from its upper end, the opening having a width slightly less than the transverse width'of the thread guide whereby the walls ofsaid recess will enter the grooves in the guide, the adapter at its lower end having a plurality of screw receiving apertures whereby it may be attached to thestandardthread guide holder, the upper end of the adapter on eachv side of the rectangular opening having a flexibletongueextending from the. edge thereof and adapted to be bent aroundagainst the underfaces of the jaws of the standard threadguide holder, the thread guideitself havingawidth somewhat greater than the distance betweenthe tips of said, horns on the standard thread guide holder.

3. The combination witha thread guide holder having atits upper end ,op-po-sed, outwardly and then inwardly curved jaws defining an openin in the end of the holder, of a thread guideforrned of a blockpf hard and highly polished material, the guidehaving a thread passage extending from front to rear and having its bottom convexly curvedfrom front to rear the side faces of the kiv ie lly.e ten in r ov andana for retaining the guide upon the holder, comprisa i m tall qr te in a rectangular opening extending inward from the upper edge of the plate, the pla te being adapted to lie against the,front face of theupper end of the holder and over the jaws thereof with the thread guide p diin h j w of th o enineo the de the plate being formed with screw receiving openings at its lower end and with flexibletongues adapter with the rear face of the thread guide flush with the rearfface of theholder.

MAX DURAFFOURG. 

